Designation B856 − 13 Standard Specification for Concentric Lay Stranded Aluminum Conductors, Coated Steel Supported (ACSS)1 This standard is issued under the fixed designation B856; the number immedi[.]
Designation: B856 − 13 Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS)1 This standard is issued under the fixed designation B856; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval Scope num Clad Stranded Steel Core for Use in Overhead Electrical Conductors B502 Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors B549 Specification for Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced for Use in Overhead Electrical Conductors B606 Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Aluminum and AluminumAlloy Conductors, Steel Reinforced B609/B609M Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes B802/B802M Specification for Zinc–5 % AluminumMischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors, Steel Reinforced (ACSR) B803 Specification for High-Strength Zinc–5 % AluminumMischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors B857 Specification for Shaped Wire Compact ConcentricLay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW) B957 Specification for Extra-High-Strength and Ultra-HighStrength Zinc-Coated (Galvanized) Steel Core Wire for Overhead Electrical Conductors B958 Specification for Extra-High-Strength and Ultra-HighStrength Class A Zinc–5% Aluminum-Mischmetal AlloyCoated Steel Core Wire for Use in Overhead Electrical Conductors E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) 2.3 Other Standards: Aluminum Association Publication 50 Code words for Overhead Aluminum Electrical Conductors3 NBS Handbook 100—Copper Wire Tables of the National Bureau of Standards4 1.1 This specification covers round wire concentric-laystranded aluminum conductors, steel supported (ACSS) for use as overhead electrical conductors (see Explanatory Note 1) 1.2 The values stated in inch-pound or SI units are to be regarded separately as standard Each system shall be used independently of the other Combining values from the two systems may result in nonconformance with the specification For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units For conductor sizes designation by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units For conductor sizes designated by SI units only, the requirements are stated or derived in SI units 1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard Referenced Documents 2.1 The following documents of the issue in effect on date of material purchase form part of this specification to the extent referenced herein: 2.2 ASTM Standards:2 B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors B354 Terminology Relating to Uninsulated Metallic Electrical Conductors B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical Conductors B500/B500M Specification for Metallic Coated or Alumi1 This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors of Light Metals Current edition approved April 1, 2013 Published May 2013 Originally approved in 1995 Last previous edition approved in 2012 as B856 – 12 DOI: 10.1520/B0856-13 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http://www.aluminum.org Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States B856 − 13 4.1.7 Package size and type (see 16.1), 4.1.8 Special package markings, if required (see 16.4), 4.1.9 Heavy wood lagging, if required (see 16.3), and 4.1.10 Place of inspection (see Section 15) Terminology 3.1 For definitions of terms relating to conductors refer to definitions found in Specification B354 3.2 Definitions: 3.2.1 aluminum-clad—aluminum bonded 3.2.2 galvanized—zinc coated 3.2.3 Zn-5A1-MM—Zinc-5% Aluminum-Mischmetal Alloy (Zn-5A1-MM) coated Requirement for Wires 5.1 After stranding, the round aluminum wires shall conform to the requirements of Specification B609/B609M for 1350-0 temper, except for elongation requirements The elongation shall not be less than 20 % after stranding 3.3 Abbreviations: 3.3.1 ACSS—aluminum conductor, steel supported 3.3.2 ACSS/AW2—supported with regular strength aluminum-clad core wire in accordance with Specification B502 3.3.3 ACSS/AW3—supported with high strength aluminumclad core wire in accordance with Specification B502 3.3.4 ACSS/GA2—supported with regular strength galvanized steel core wire, coating Class A in accordance with Specification B498/B498M 3.3.5 ACSS/GC2—supported with regular strength galvanized steel core wire, coating Class C in accordance with Specification B498/B498M 3.3.6 ACSS/GA3—supported with high-strength galvanized steel core wire in accordance with Specification B606 3.3.7 ACSS/GA4—supported with extra-high strength zinc Class A coated steel core wire in accordance with Specification B957 3.3.8 ACSS/GA5—supported with ultra-high strength zinc Class A coated steel core wire in accordance with Specification B957 3.3.9 ACSS/MA2—supported with regular strength Zn5A1-MM coated steel core wire, coating Class A in accordance with Specification B802/B802M 3.3.10 ACSS/MA3—supported with high-strength Zn5A1-MM coated steel core wire in accordance with Specification B803 3.3.11 ACSS/MA4—supported with extra-high strength Zinc-5% Aluminum-Mischmetal Alloy (Zn-5A1-MM) Coated steel core wire in accordance with Specification B958 3.3.12 ACSS/MA5—supported with ultra-high strength Zinc-5% Aluminum-Mischmetal Alloy (Zn-5A1-MM) Coated steel core wire in accordance with Specification B958 5.2 Before stranding, the steel core wire shall meet the requirements of Specification B498/B498M, B606, B802/ B802M, B803, B957, or B958, whichever is applicable 5.3 The stranded steel core shall meet the requirements of Specification B500/B500M as applicable Joints 6.1 Electric-butt welds, cold-pressure welds, and electricbutt, cold-upset welds in the finished individual aluminum wires composing the conductor may be made during the stranding process No weld shall occur within 50 ft (15 m) of a weld in the same wire or in any other wire of the completed conductor (see Explanatory Note 2) 6.2 There shall be no joints of any kind made in the finished coated steel wires Lay 7.1 The length of lay of the various layers of aluminum wires in a conductor shall conform to Table (see Explanatory Note 3) 7.2 The length of lay of the various layers of steel wires in a conductor shall conform to Specification B500/B500M 7.3 The direction of lay of the outside layer of aluminum wires shall be right hand unless otherwise specified in the purchase order The direction of lay of the aluminum and steel wires shall be reversed in successive layers Construction 8.1 The number and diameter of the aluminum and steel wires and the area of cross section of the aluminum wires for standard constructions are shown in Table 8.2 ACSS may be constructed using steel core wire with a number of different types The acceptable core wires are, but not limited to: 8.2.1 Regular strength Galvanized steel core wires, with coating Classes A or C (designated GA2 and GC2) in accordance with Specification B498/B498M (see Explanatory Note 9); 8.2.2 High-strength galvanized steel core wire, coating Class A (designated GA3) in accordance with Specification B606 (see Explanatory Note 9); 8.2.3 Regular strength Zn-5A1-MM coated steel core wire, coating Class A (designated MA2) in accordance with Specification B802/B802M; 8.2.4 High-strength Zn-5A1-MM coated steel core wire, coating Class A (designated MA3) in accordance with Specification B803; Ordering Information 4.1 Orders for material under this specification shall include the following information: 4.1.1 Quantity of each size, stranding, and class, 4.1.2 Conductor size, circular-mil area or AWG, and diameter (see Section and Table 1), 4.1.3 Number of wires, aluminum and steel, 4.1.4 Type of steel core wire and class (if applicable) of coating (see 5.2), 4.1.5 Direction of lay of outer layer of aluminum wires if other than right hand (see 7.3), 4.1.6 Special tension test, if desired (see 14.3), Stranding 26/7 30/7 26/7 26/7 30/7 24/7 26/7 30/7 24/7 26/7 30/7 24/7 26/7 30/7 24/7 26/7 30/7 30/19 24/7 26/7 30/7 30/19 24/7 26/7 24/7 26/7 30/19 24/7 26/7 42/7 45/7 54/7 30/19 45/7 54/7 24/7 45/7 48/7 54/7 30/19 42/7 45/7 54/7 45/7 54/19 45/7 54/19 45/7 54/19 45/7 54/19 Size (kcmil) 266.8 266.8 300.0 336.4 336.4 397.5 397.5 397.5 477.0 477.0 477.0 556.5 556.5 556.5 605.0 605.0 605.0 605.0 636.0 636.0 636.0 636.0 666.6 666.6 715.5 715.5 715.5 795.0 795.0 795.0 795.0 795.0 795.0 900.0 900.0 954.0 954.0 954.0 954.0 954.0 1033.5 1033.5 1033.5 1113.0 1113.0 1192.5 1192.5 1272.0 1272.0 1351.0 1351.0 Partridge/ACSS Junco/ACSS Ostrich/ACSS Linnet/ACSS Oriole/ACSS Brant/ACSS Ibis/ACSS Lark/ACSS Flicker/ACSS Hawk/ACSS Hen/ACSS Parakeet/ACSS Dove/ACSS Eagle/ACSS Peacock/ACSS Squab/ACSS Wood Duck/ACSS Teal/ACSS Rook/ACSS Grosbeak/ACSS Scoter/ACSS Egret/ACSS Flamingo/ACSS Gannet/ACSS Stilt/ACSS Starling/ACSS Redwing/ACSS Cuckoo/ACSS Drake/ACSS Macaw/ACSS Tern/ACSS Condor/ACSS Mallard/ACSS Ruddy/ACSS Canary/ACSS Redbird/ACSS Rail/ACSS Towhee/ACSS Cardinal/ACSS Canvasback/ACSS Snowbird/ACSS Ortolan/ACSS Curlew/ACSS Bluejay/ACSS Finch/ACSS Bunting/ACSS Grackle/ACSS Bittern/ACSS Pheasant/ACSS Dipper/ACSS Martin/ACSS CodewordA ACSS Conductor AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA Class 26 30 26 26 30 24 26 30 24 26 30 24 26 30 24 26 30 30 24 26 30 30 24 26 24 26 30 24 26 42 45 54 30 45 54 24 45 48 54 30 42 45 54 45 54 45 54 45 54 45 54 Number 0.1013 0.0943 0.1074 0.1137 0.1059 0.1287 0.1236 0.1151 0.1410 0.1354 0.1261 0.1523 0.1463 0.1362 0.1588 0.1525 0.1420 0.1420 0.1628 0.1564 0.1456 0.1456 0.1667 0.1601 0.1727 0.1659 0.1544 0.1820 0.1749 0.1376 0.1329 0.1213 0.1628 0.1414 0.1291 0.1994 0.1456 0.1410 0.1329 0.1783 0.1569 0.1515 0.1383 0.1573 0.1436 0.1628 0.1486 0.1681 0.1535 0.1733 0.1582 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 7 7 7 7 7 7 7 7 19 7 19 7 7 19 7 7 19 7 7 7 19 7 7 19 19 19 19 0.0788 0.0943 0.0835 0.0885 0.1059 0.0858 0.0962 0.1151 0.0940 0.1053 0.1261 0.1015 0.1138 0.1362 0.1058 0.1186 0.1420 0.0852 0.1085 0.1216 0.1456 0.0874 0.1111 0.1245 0.1151 0.1290 0.0927 0.1213 0.1360 0.0764 0.0886 0.1213 0.0977 0.0943 0.1291 0.1329 0.0971 0.1097 0.1329 0.1070 0.0871 0.1010 0.1383 0.1048 0.0861 0.1085 0.0892 0.1121 0.0921 0.1155 0.0949 Diameter (in.) Number Diameter (in.) Layers Steel Wires Aluminum Wire 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 Layers 366.8 417.4 412.4 462.5 526.3 511.4 546.5 621.9 613.6 655.8 746.3 716.1 765.1 870.6 778.3 831.8 946.5 938.6 818.2 874.4 995.0 986.8 857.6 916.4 920.5 983.7 1,110 1,023 1,093 857.5 894.9 1,023 1,233 1,013 1,158 1,227 1,074 1,122 1,227 1,480 1,115 1,163 1,330 1,253 1,429 1,342 1,531 1,432 1,633 1,521 1,735 Nominal Mass GA(X) or MA(X) (lb/1000 ft) 8.88 11.7 10.0 11.2 14.8 11.0 13.0 17.5 13.0 15.6 21.0 15.2 18.2 24.5 16.5 19.7 26.0 26.6 17.3 20.7 27.4 28.0 18.2 21.7 19.5 23.3 30.9 21.7 25.9 11.8 14.2 21.7 34.3 15.8 24.6 26.0 16.7 19.7 26.0 41.1 15.4 18.1 28.2 19.5 30.4 20.9 32.6 22.3 34.1 23.7 36.2 GA2 or MA2 (kips) 9.73 13.0 10.9 12.3 16.3 12.1 14.2 19.3 14.2 17.1 22.7 16.6 19.9 26.5 18.0 21.7 28.3 29.3 19.0 22.4 29.7 30.9 19.9 23.4 21.3 25.2 34.1 23.3 28.0 12.6 15.2 23.3 37.9 17.0 26.4 28.0 18.0 21.3 28.0 45.4 16.4 19.5 30.3 21.0 33.2 22.5 35.5 24.0 37.3 25.5 39.6 GA3 or MA3 (kips) TABLE Construction Requirements of Aluminum Conductors, Steel Supported (ACSS) 10.8 14.4 12.1 13.6 18.2 13.3 15.8 21.5 15.7 18.9 25.3 18.3 22.1 29.6 19.9 24.0 31.6 32.6 20.9 24.8 33.2 34.3 21.9 26.0 23.5 27.9 37.9 25.7 31.0 13.6 16.5 25.7 42.1 18.5 29.1 30.9 19.6 23.3 30.9 50.5 17.7 21.2 33.4 22.8 36.5 24.5 39.1 26.1 41.1 27.7 43.6 GA4 or MA4 (iips) 11.4 15.2 12.8 14.4 19.1 14.1 16.5 22.6 16.4 19.8 26.7 19.1 23.1 31.1 20.8 25.1 33.3 34.7 21.9 26.0 35.0 36.6 22.9 27.3 24.6 29.3 39.8 26.9 32.6 14.2 17.4 26.9 44.3 19.2 30.5 32.3 20.4 24.3 32.3 53.1 18.5 22.0 35.0 23.8 38.7 25.4 41.5 27.1 43.0 28.8 45.6 GA5 or MA5 (kips) Rated Strength (by type and coating of steel wires) 8.37 11.2 9.40 10.5 14.2 10.4 12.4 16.7 12.5 14.9 20.1 14.6 17.5 22.9 15.9 19.0 24.4 25.0 16.7 19.9 25.1 26.3 17.5 20.9 18.8 22.0 29.5 20.9 24.4 11.4 13.5 20.9 32.9 15.3 23.2 24.6 16.2 19.0 24.6 39.4 14.8 17.6 26.1 18.9 28.7 20.3 30.8 21.6 32.8 23.0 34.9 AW2 (kips) 8.88 11.7 10.0 11.2 14.8 11.0 13.0 17.5 13.0 15.6 20.5 15.2 18.2 24.0 16.5 19.7 25.5 26.6 17.3 20.3 26.8 28.0 18.2 21.3 19.5 22.9 30.9 21.3 25.4 11.8 14.2 21.3 34.3 15.8 24.1 25.5 16.7 19.7 25.5 41.1 15.4 18.1 27.7 19.5 30.4 20.9 32.6 22.3 34.1 23.7 36.2 AW3 (kips) B856 − 13 A 45/7 54/19 45/7 54/19 42/7 45/7 54/19 84/19 72/7 76/19 84/19 72/7 76/19 76/19 12/7 12/7 12/7 12/7 12/7 12/7 16/19 12/7 1431.0 1431.0 1510.0 1510.0 1590.0 1590.0 1590.0 1780.0 2034.5 2057.0 2156.0 2167.0 2312.0 2515.0 101.8 110.8 134.6 159.0 176.9 190.8 203.2 211.3 Bobolink/ACSS Plover/ACSS Nuthatch/ACSS Parrot/ACSS Ratite/ACSS Lapwing/ACSS Falcon/ACSS Chukar/ACSS Mockingbird/ACSS Roadrunner/ACSS Bluebird/ACSS Kiwi/ACSS Thrasher/ACSS Joree/ACSS Petrel/ACSS Minorca/ACSS Leghorn/ACSS Guinea/ACSS Dotterel/ACSS Dorking/ACSS Brahma/ACSS Cochin/ACSS CodewordA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA(HS) AA(HS) AA(HS) AA(HS) AA(HS) AA(HS) AA(HS) AA(HS) Class 45 54 45 54 42 45 54 84 72 76 84 72 76 76 12 12 12 12 12 12 16 12 Number 0.1783 0.1628 0.1832 0.1672 0.1946 0.1880 0.1716 0.1456 0.1681 0.1645 0.1602 0.1735 0.1744 0.1819 0.0921 0.0961 0.1059 0.1151 0.1214 0.1261 0.1127 0.1327 3 3 3 3 3 3 3 1 1 1 19 19 7 19 19 19 19 19 19 7 7 7 19 0.1189 0.0977 0.1221 0.1003 0.1081 0.1253 0.1030 0.0873 0.1121 0.0768 0.0961 0.1157 0.0814 0.0849 0.0921 0.0961 0.1059 0.1151 0.1214 0.1261 0.0977 0.1327 Diameter (in.) Number Diameter (in.) Layers Steel Wires Aluminum Wire Continued 2 1 2 2 2 1 1 1 Layers 1,611 1,837 1,700 1,939 1,715 1,790 2,041 2,071 2,159 2,245 2,508 2,300 2,524 2,745 253.8 276.3 335.5 396.3 440.9 475.7 674.6 526.8 Nominal Mass GA(X) or MA(X) (lb/1000 ft) 25.1 38.4 26.5 40.4 23.4 27.9 42.6 35.3 27.2 31.7 42.1 29.0 35.6 38.7 10.2 11.1 13.5 15.9 17.7 19.1 30.5 21.2 GA2 or MA2 (kips) 27.0 41.9 28.1 44.2 25.0 29.6 46.6 38.2 28.9 33.9 45.5 30.8 38.1 41.4 11.4 12.4 15.0 17.8 19.4 20.9 34.1 23.1 GA3 or MA3 (kips) 29.4 46.2 30.6 48.7 26.9 32.2 51.4 41.6 31.0 36.5 49.6 33.0 41.0 44.6 12.8 13.9 16.9 20.0 21.8 23.5 38.3 26.0 GA4 or MA4 (iips) 30.5 48.3 31.8 51.0 27.9 33.5 53.7 43.9 32.0 38.3 51.7 34.1 43.0 46.8 13.5 14.7 17.8 21.0 23.0 24.8 40.5 27.5 GA5 or MA5 (kips) Rated Strength (by type and coating of steel wires) 24.3 36.9 25.7 38.9 22.7 27.0 41.1 33.6 26.5 30.3 40.7 28.2 34.1 37.1 9.7 10.6 12.9 15.2 16.9 18.3 29.1 19.7 AW2 (kips) Code words shown in this column are obtained from “Publication 50, Code Words for Overhead Aluminum Electrical Conductors,” by the Aluminum Association They are provided for information only Conversion factors – inch-pound to SI: kcmil = 0.5067 mm2 inch = 2.5400 mm lb/1000 ft = 1.488 kg/km kip (1000 lbf) = 4.448 kN Stranding Size (kcmil) ACSS Conductor TABLE 25.1 38.4 26.1 40.4 23.4 27.5 42.6 35.3 27.2 31.7 42.1 29.0 35.6 38.7 10.2 11.1 13.5 15.9 17.3 18.7 30.5 20.7 AW3 (kips) B856 − 13 B856 − 13 TABLE Lay Factors for Aluminum Conductors, Steel-Supported (ACSS), Concentric-Lay-StrandedA Ratio of Length of Lay of a Layer to Nominal Outside Diameter of That Layer Stranding Class AA A B Aluminum Wire Layers Stranding 76/19, 84/19 72/7 54/19 54/7, 45/7 30/19 30/7, 26/7, 24/7 16/19 12/7 First (Outside) Second Third Fourth (Inside) prefB max pref max max max 10 11 13 10 13 16 10 17 10 17 10 10 10 10 10 11 11 11 11 11 13 13 13 13 13 10 10 10 10 10 13 13 13 13 13 16 16 16 16 16 10 10 10 17 17 17 10 17 10 10 12.5 12.5 14.5 14.5 See Specification B500/B500M for lay factors of the steel core wires Preferred (pref) specified in Specification B609/B609M The strength contribution of the steel core wires shall be taken as that percentage, indicated in Table 3, of the sum of the strengths of the steel wires, calculated from their specified nominal wire diameter and the appropriate minimum ultimate tensile strengths given in Specification B498/B498M, B502, B549, B606, B802/ B802M, B803, B957, or B958, whichever is applicable 8.2.5 Extra-high-strength galvanized steel core wire coating Class A (designated GA4) in accordance with Specification B957 (see Explanatory Note 9); 8.2.6 Extra-high-strength Zn-5Al-MM coated steel core wire, coating Class A (designated MA4) in accordance with Specification B958; 8.2.7 Ultra-high-strength galvanized steel core wire coating Class A (designated GA5) in accordance with Specification B957 (see Explanatory Note 9); 8.2.8 Ultra-high-strength Zn-5Al-MM coated steel core wire, coating Class A (designated MA5) in accordance with Specification B958; 8.2.9 Regular strength Aluminum Clad steel (designated AW2 in accordance with B502; 8.2.10 High-strength Aluminum Clad steel (designated AW3 in accordance with B502 9.2 Rated strength and breaking strength values shall be rounded to three significant figures, in the final value only, in accordance with the rounding method of Practice E29 9.3 Rated strength of typical constructions are given in Table 10 Density 10.1 For the purpose of calculating mass, cross sections, and so forth, the density of aluminum 1350 shall be taken as 0.0975 lb/in.3 (2705 kg/m3) at 20°C (see Explanatory Note 4) Rated Strength of Conductor 9.1 The rated strength of the completed ACSS conductor shall be taken as the aggregate strengths of the aluminum and steel components, calculated as follows The strength contribution of the aluminum wires shall be taken as that percentage, indicated in Table 3, of the sum of the strengths of the 1350-0 wires calculated from their minimum average tensile strengths 10.2 For the purpose of calculating mass, cross sections, and so forth, the density of galvanized or Zn-5A1-MM alloy coated steel wire shall be taken as 0.281 lb/in.3 (7780 kg/m3) at 20°C 10.3 For the purposes of calculating mass, cross sections, and so forth, the density of aluminum-clad steel wire shall be taken as 0.2381 lb/in.3 (6590 kg/m3) at 20°C TABLE Standard Increments and Rating Factors for Mass, Resistivity, and Rated Strength Determination 11 Mass and Electrical Resistance Standard Increments Due to Rating Factors (for Rated Stranding (for Mass and Stranding Design Strength) Resistivity) Increase Aluminum/Steel Aluminum, % Steel, % Aluminum, % Steel, % 12/7 24/7 26/7 30/7 42/7 45/7 48/7 54/7 72/7 16/19 30/19 54/19 76/19 84/19 2.5 2.5 2.5 2.75 2.5 2.5 2.5 2.5 3.0 2.5 2.75 3.0 3.0 3.0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.6 0.6 0.6 0.6 0.6 96 96 96 96 96 96 96 96 96 96 96 96 96 96 11.1 The mass and electrical resistance of a unit length of stranded conductor are a function of the length of lay The approximate weight and electrical resistance may be determined using the standard increments shown in Table When greater accuracy is desired, the increment based on the specific lay of the conductor may be calculated (see Explanatory Note 5) 100 100 100 100 100 100 100 100 100 100 100 100 100 100 11.2 In the calculation of the electrical resistance of a conductor, the zinc-coated, Zn-5A1-MM-coated, steel core wires shall be taken as 0.19157 Ω·mm2/m at 20°C and the resistivity of aluminum-clad steel core wires shall be taken as 0.0848 Ω·mm2/m at 20°C These are typical values and are not guaranteed The electrical resistance of the aluminum wires shall be taken as 0.0279 Ω·mm2/m at 20°C B856 − 13 or within in (25 mm) of the end of either gripping device (see Explanatory Note 7) 14.4 Tests for all properties of zinc-coated, Zn-5A1–MM coated, or aluminum-clad steel wires shall be made before stranding (see Explanatory Note 5) 12 Workmanship, Finish, and Appearance 12.1 The conductor shall be free of all imperfections not consistent with good commercial practice 13 Variation in Area 15 Inspection 15.1 Unless otherwise specified in the contract or purchase order, the manufacturer shall be responsible for the performance of all inspection and test requirements specified 15.2 All inspections and tests shall be made at the place of manufacture unless otherwise especially agreed upon between the manufacturer and the purchaser at the time of the purchase 15.3 The manufacturer shall afford the inspector representing the purchaser all reasonable manufacturer’s facilities to satisfy him that the material is being furnished in accordance with this specification 13.1 The area of cross section of the aluminum wires of a conductor shall be not less than 98 % of the area specified Unless otherwise specified by the purchaser, the manufacturer may have the option of determining the cross-sectional area by either of the following methods, except that in case of a question regarding area compliance, the method of 13.1.2 shall be used: 13.1.1 The area of cross section may be determined by calculations from diameter measurements, expressed to four decimal places, of the component aluminum wires at any point when measured perpendicularly to their axes 13.1.2 The area of cross section of the aluminum wires of a conductor may be determined by Test Method B263 In applying that method the increment in linear density resulting from stranding may be the applicable value specified in 13.1 or may be calculated from the measured component dimensions of the sample under test In case of a question regarding area compliance, the actual linear density increment due to stranding shall be calculated 16 Packaging and Package Marking 16.1 Package sizes and kind of package, reels or coils, shall be agreed upon between the manufacturer and the purchaser Recommended package sizes are shown in Table (see Explanatory Note 8) 16.2 There shall be only one length of conductor on a reel 16.3 The conductors shall be protected against damage in ordinary handling and shipping If heavy wood lagging is required, it shall be specified by the purchaser at the time of placing the purchase order 16.4 The net linear density, length, size, kind of conductors, stranding, type of coating, class of coating, and any other necessary identification shall be marked on a tag attached to the end of the conductor inside the package This same information, together with the purchase order number, the manufacturer’s serial number (if any), and all shipping marks and other information required by the purchaser shall appear on the outside of the package 14 Mechanical and Electrical Tests 14.1 Tests for mechanical and electrical properties of aluminum wires shall be made after stranding (see Explanatory Note 6) 14.2 The electrical resistivity shall meet the minimum resistivity specified for the wire after stranding The frequency of these tests shall be agreed upon between the purchaser and the manufacturer 14.3 Tests for demonstration of rated strength of the completed conductor are not required by this specification but may be made if agreed upon between the manufacturer and the purchaser at the time of placing an order If tested, the breaking strength of the completed conductor shall be not less than the rated strength if failure occurs in the free length at least in (25 mm) beyond the end of either gripping device, or shall be not less than 95 % of the rated strength if failure occurs inside, 17 Keywords 17.1 ACSS; aluminum conductors; concentric-lay stranded aluminum conductors; electrical conductors; electrical conductors; aluminum; steel-reinforced conductors; steel-supported aluminum conductors; stranded aluminum conductors B856 − 13 TABLE Packaging Information—Recommended Reel Sizes, Shipping Lengths, and Net Masses Size Reel Types cmil AWG 312 000 167 000 156 000 780 000 590 000 590 000 510 500 510 500 431 000 431 000 351 000 351 000 272 000 272 000 192 500 192 500 113 000 113 000 033 500 033 500 954 000 954 000 900 000 900 000 795 000 795 000 795 000 795 000 795 000 715 500 715 500 715 500 666 600 666 600 636 000 636 000 636 000 636 000 605 000 605 000 605 000 605 000 556 500 556 500 556 500 477 000 477 000 477 000 397 500 397 500 397 500 336 400 336 400 300 000 266 800 211 300 203 200 190 800 176 900 159 000 134 600 110 800 101 800 Stranding Design Aluminum/ Steel 76/19 72/7 84/19 84/19 54/19 45/7 54/19 45/7 54/19 45/7 54/19 45/7 54/19 45/7 54/19 45/7 54/19 45/7 54/7 45/7 54/7 45/7 54/7 45/7 30/19 54/7 45/7 26/7 24/7 30/19 26/7 24/7 26/7 24/7 30/19 30/7 26/7 24/7 30/19 30/7 26/7 24/7 30/7 26/7 24/7 30/7 26/7 24/7 30/7 26/7 24/7 30/7 26/7 26/7 26/7 12/7 16/19 12/7 12/7 12/7 12/7 12/7 12/7 RMT RM NR Reel Size Length on Reel (feet) Net Mass (lb) Reel Size Length on Reel (feet) Net Mass (lb) Length on Net Mass Reel Size Reel (lb) (feet) 96.60 96.60 96.60 96.60 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 90.45 84.45 90.45 90.45 84.36 84.36 84.45 84.36 84.36 84.36 84.36 84.45 84.36 84.36 84.45 84.36 84.36 84.36 84.36 84.36 84.36 84.36 84.36 84.36 7000 7000 7500 9200 5740 6000 6040 6320 6375 6665 6755 7060 7175 7500 7650 8000 8200 8570 8870 9230 9600 10 000 10 180 10 590 7980 11 520 12 000 6940 6400 8880 7710 7100 8280 7630 9980 8670 8000 10 490 9110 8410 9910 9140 11 560 10 660 13 870 12 790 16 390 17 660 16 100 18 810 19 060 11 720 10 740 11 710 10 740 11 720 10 730 11 720 10 740 11 720 10 740 11 720 10 740 11 730 10 740 11 790 10 730 11 780 10 740 11 790 10 730 9850 11 780 10 740 7590 6540 9850 7580 6540 7590 6550 9850 7580 6550 9850 7570 6550 7580 6550 7580 6540 7570 6540 7570 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 68.38 66.32 68.38 68.38 66.32 66.32 66.32 66.32 66.32 66.32 66.32 66.32 66.32 66.32 2870 3000 3020 3160 3190 3335 3375 3530 3585 3750 3825 4000 4100 4285 4435 4615 4800 5000 5090 5295 3990 5760 6000 4440 4990 5005 5245 5245 5700 6650 7980 9430 7875 5860 5370 5850 5370 5860 5370 5860 5370 5860 5370 5860 5370 5860 5370 5890 5370 5890 5370 5890 5360 4920 5890 5370 4930 4930 4980 4920 4960 4960 4960 4960 4960 5310 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 60.28 48.28 48.28 48.28 48.28 48.28 48.28 48.28 2000 2110 2220 2355 2500 2665 2855 3075 3335 3530 4000 3470 3200 3855 3550 4140 3815 4335 4000 4555 4205 4955 4570 5780 5330 6935 6395 8195 9190 10 330 6020 6665 7195 8000 9450 11 480 12 500 3580 3590 3580 3580 3580 3580 3580 3580 3580 3580 3580 3790 3270 3790 3270 3790 3270 3790 3270 3790 3270 3790 3270 3790 3270 3790 3270 3790 3790 3790 3170 3170 3170 3170 3170 3170 3170 B856 − 13 EXPLANATORY NOTES NOTE 1—In this specification only, concentric-lay-stranded aluminum conductors, steel supported, are specifically designated Conductor constructions not included in this specification should be agreed upon between the manufacturer and the purchaser when placing the order Requirements of shaped wire compact concentric-lay-stranded aluminum conductors, steel supported may be found in specification B857 NOTE 2—The behavior of properly spaced wire joints in stranded conductors is related to both their tensile strength and elongation Because of its higher elongation properties, the lower-strength electric-butt weld gives equivalent overall performance to that of a cold-pressure weld or an electric-butt, cold-upset weld in stranded conductors NOTE 3—The preferred ratio of the lay with respect to the outside diameter of a layer of wires varies for different layers and for different diameters of the conductor, being larger for the inside layers than for the outside layers, and larger for conductors of smaller diameter than for those of larger diameter NOTE 4—The density is based upon aluminum of 99.50 % purity The inch-pound density of the aluminum wires is used for linear density calculations and is based upon the standard SI density with the conversion rounded to the nearest 0.0005 lb/in.3 NOTE 5—The increment of weight or electrical resistance of a completed concentric-lay-stranded conductor (k) in percent is as follows: m ind = 11 ~ 9.8696/n ! (2) where: n = length of lay (3) diameter of helical path of wires The derivation of the above is given in NBS Handbook 100 The factors k and m are to be determined separately for the zinc-coated or aluminum-coated steel (see Section 7) NOTE 6—Wires unlaid from conductors may have different physical properties from those of the wire when prepared for cabling, on account of the deformation caused by laying and again straightening for test If tests on galvanized or aluminum-coated steel wires are to be made after stranding, the purchaser and the manufacturer at the time of placing the order should agree on the properties to be met NOTE 7—To test ACSS conductors for breaking strength successfully as a unit requires special devices for gripping the ends of the aluminum and steel wires without causing damage that may result in failure below the actual strength of the conductor Various special dead-end devices are available such as compression sleeves and split sleeves, but ordinary jaws or clamping devices usually are not suitable NOTE 8—For the convenience of the user of this specification, Table has been prepared giving recommended shipping lengths for the standard sizes of ACSS referred to in Table Because of the variation in coil weights, and so forth, it is common practice to allow a permissible tolerance in length of 65 % for sizes larger than No AWG and a tolerance of 610 % on sizes No AWG and smaller It is also common practice to allow an amount not exceeding 10 % of the total weight of any one order to be shipped in random lengths with no piece shorter than 50 % of the standard length ordered NOTE 9—Industry practice has limited the use of ACSS conductors built with zinc galvanized steel core material to an operational conductor temperature limit of 200°C (1) k 100 ~ m ! where m is the stranding factor, and also the ratio of the weight or electrical resistance of a unit length of stranded conductor to that of a solid conductor of the same cross-sectional area or of a stranded conductor with infinite length of lay, this is, all wires parallel to the conductor axis The stranding factor m for the completed stranded conductor is the numerical average of the stranding factors for each of the individual wires in the conductor, including the straight core wire, if any (for which the stranding factor is unity) The stranding factor (mind) for any given wire in a concentric-lay-stranded conductor is: ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org) Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/ COPYRIGHT/)